HV terminal connector

[bahram]

As far as I know, there is no specific guideline in NEMA CC1-2002 for selecting the number of bolt holes for a terminal connectors. It only introduces the typical configurations in Appendix A.

As it is clear, the number of bolt holes is related to the rated current of connector. Is there any specific instruction in this regard?

What is the standards recommendation for a terminal connector with current rating of 1600A and 2500A.

 

[jbartos]

Suggestion: Contact NEMA since it is not currently shown on NEMA web:

http://www.nema.org/help/titles.html

http://www.nema.org/help/docno.html

 

[RajT]

I don't think there are any atandards as such. It is more of a question of engineering judgement. For high current ( say 1000A plus) lugs, one should allow for 4 bolts subject to adequate spacing between hole centres.

 

[jghrist]

NEMA requires connectors to operate cooler than the conductor in a standard heat run test. For normal operation, you should be able to use whichever connector is listed for the conductor you are using. If you are designing to run at high conductor temperatures, however, I'd use a larger connector (more bolts). The more area on the connector the better.